My chickens are 6.25 months old. One is a barred rock and the other is a brown leghorn. A few days ago I noticed the brown leghorn squatting for me when I went out to the run. Then today while feeding I noticed the barred rock was squatting. I put out some oyster shell for them tonight to help them out a bit. When do you think they'll lay? I don't use any artificial light and I live down in FL - so it's pretty warm here.